The actual problem is that newer versions of Alpha100 come with version 7.80. But the latest version available via Webupdater or Express is 7.80.
If you flash 7.80 into a new Alpha (for example, patched), then the compass stops calibtation. And you cannot return Alpha back to 7.90, since it is not freely available.
Help me!
See below, Posts 4 to 8 for compass fix solution and [Only registered and activated users can see links. ] for hybrid V7.80/V7.90 firmware RGN file.
Note Warnings!